[mythtv-users] NVidia non-interlaced video output quality-loss?

[steve at nexusuk.org]

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On Sun, 15 Feb 2004, Thomas Börkel wrote:

> What are the exact consequences of the non-interlaced video output with 
> the NVidia cards?

A loss of picture sharpness - basically it's slightly blurry in the 
vertical direction and high motion scenes will look a bit blurry as it 
combines the 2 fields (which will be significantly different from 
eachother in high motion scenes).  Its basically the same as turning on 
deinterlacing in Myth.

Horizontal resolution should be unaffected.

> Assuming that analog TV is 352x380 native, would I then only have 
> 352x240? Isn't that a big loss in quality?

Where are you getting 352x380 from?  PAL is 768x576 and NTSC is 720x480.  
Deinterlacing only affects the vertical resolution, and it doesn't just 
throw away one field, it blends them together, so the output won't be 
nearly as bad as just throwing away one field (nor will it be anywhere 
near as good as keeping all the fields and watching an interlaced 
picture).

- -- 

 - Steve                                             http://www.nexusuk.org/

     Servatis a periculum, servatis a maleficum - Whisper, Evanescence

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